JP2006290831A - Method for purifying cellobiose and method for producing the same - Google Patents
Method for purifying cellobiose and method for producing the same Download PDFInfo
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- GUBGYTABKSRVRQ-CUHNMECISA-N D-Cellobiose Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1O[C@@H]1[C@@H](CO)OC(O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-CUHNMECISA-N 0.000 title claims abstract description 183
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 235000000346 sugar Nutrition 0.000 claims abstract description 65
- 238000001035 drying Methods 0.000 claims abstract description 11
- 239000013078 crystal Substances 0.000 claims description 30
- 239000012528 membrane Substances 0.000 claims description 17
- 150000001720 carbohydrates Chemical class 0.000 claims description 15
- 235000014633 carbohydrates Nutrition 0.000 claims description 15
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims description 13
- 238000000108 ultra-filtration Methods 0.000 claims description 13
- 108010059892 Cellulase Proteins 0.000 claims description 12
- 229940106157 cellulase Drugs 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 10
- 230000002378 acidificating effect Effects 0.000 claims description 7
- 238000005194 fractionation Methods 0.000 claims description 6
- 239000003729 cation exchange resin Substances 0.000 claims description 5
- 238000001223 reverse osmosis Methods 0.000 claims description 5
- 238000002036 drum drying Methods 0.000 claims description 3
- 238000001694 spray drying Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 239000007788 liquid Substances 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract 2
- 239000000243 solution Substances 0.000 description 65
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 21
- 239000008103 glucose Substances 0.000 description 21
- 239000002002 slurry Substances 0.000 description 18
- 238000002425 crystallisation Methods 0.000 description 16
- 230000008025 crystallization Effects 0.000 description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 12
- 238000011084 recovery Methods 0.000 description 11
- 239000003456 ion exchange resin Substances 0.000 description 8
- 229920003303 ion-exchange polymer Polymers 0.000 description 8
- 239000007787 solid Substances 0.000 description 8
- 229920002678 cellulose Polymers 0.000 description 7
- 239000001913 cellulose Substances 0.000 description 7
- 238000000746 purification Methods 0.000 description 6
- 238000004090 dissolution Methods 0.000 description 5
- 238000006460 hydrolysis reaction Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 4
- 235000013305 food Nutrition 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000002537 cosmetic Substances 0.000 description 3
- 229920001542 oligosaccharide Polymers 0.000 description 3
- 150000002482 oligosaccharides Chemical class 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 108090000790 Enzymes Proteins 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 241000223261 Trichoderma viride Species 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001773 cellobioses Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 238000011033 desalting Methods 0.000 description 2
- 206010012601 diabetes mellitus Diseases 0.000 description 2
- 229940088598 enzyme Drugs 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 235000013402 health food Nutrition 0.000 description 2
- 238000004128 high performance liquid chromatography Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 125000000962 organic group Chemical group 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000228212 Aspergillus Species 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 101100482117 Saimiri sciureus THBD gene Proteins 0.000 description 1
- 241000223259 Trichoderma Species 0.000 description 1
- 241000219094 Vitaceae Species 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 239000008351 acetate buffer Substances 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- 108010047754 beta-Glucosidase Proteins 0.000 description 1
- 102000006995 beta-Glucosidase Human genes 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000002144 chemical decomposition reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 150000002016 disaccharides Chemical class 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 230000007515 enzymatic degradation Effects 0.000 description 1
- 235000003599 food sweetener Nutrition 0.000 description 1
- 235000021021 grapes Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002772 monosaccharides Chemical class 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000003765 sweetening agent Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13K—SACCHARIDES OBTAINED FROM NATURAL SOURCES OR BY HYDROLYSIS OF NATURALLY OCCURRING DISACCHARIDES, OLIGOSACCHARIDES OR POLYSACCHARIDES
- C13K13/00—Sugars not otherwise provided for in this class
- C13K13/007—Separation of sugars provided for in subclass C13K
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H3/00—Compounds containing only hydrogen atoms and saccharide radicals having only carbon, hydrogen, and oxygen atoms
- C07H3/04—Disaccharides
-
- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
- C13B30/00—Crystallisation; Crystallising apparatus; Separating crystals from mother liquors ; Evaporating or boiling sugar juice
- C13B30/02—Crystallisation; Crystallising apparatus
-
- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13K—SACCHARIDES OBTAINED FROM NATURAL SOURCES OR BY HYDROLYSIS OF NATURALLY OCCURRING DISACCHARIDES, OLIGOSACCHARIDES OR POLYSACCHARIDES
- C13K1/00—Glucose; Glucose-containing syrups
- C13K1/02—Glucose; Glucose-containing syrups obtained by saccharification of cellulosic materials
- C13K1/04—Purifying
-
- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13K—SACCHARIDES OBTAINED FROM NATURAL SOURCES OR BY HYDROLYSIS OF NATURALLY OCCURRING DISACCHARIDES, OLIGOSACCHARIDES OR POLYSACCHARIDES
- C13K13/00—Sugars not otherwise provided for in this class
Abstract
Description
本発明は、セロビオース含有糖液から高純度のセロビオースを高収率で安価に回収する方法、及び水に対する溶解性の高いセロビオースの製造方法に関する。
に関する。
The present invention relates to a method for recovering high-purity cellobiose from a cellobiose-containing sugar solution at a high yield and low cost, and a method for producing cellobiose having high solubility in water.
About.
セロビオースは、植物などに広く分布するセルロースの分解過程で生成する二糖類であり、ブドウ糖二分子がβ−１,４結合で結合した構造を有する。このセロビオースは松葉やトウモロコシの茎等に存在する天然物であり、甘味を伴うが、ヒトによって分解されないことから、効率良く安価にセロビオースを製造することができれば、健康食品や糖尿病患者用食品の甘味料、あるいは化粧品原料、医薬品原料として有用であると考えられる。 Cellobiose is a disaccharide produced in the process of degrading cellulose widely distributed in plants and the like, and has a structure in which two glucose molecules are linked by β-1,4 bonds. This cellobiose is a natural product that exists in pine needles, corn stalks, etc., and has sweetness, but it is not decomposed by humans, so if cellobiose can be produced efficiently and inexpensively, the sweetness of health foods and foods for diabetes It is considered useful as a raw material for cosmetics, cosmetics, and pharmaceuticals.
従来から知られているセロビオースの製造法としては、セルロースを化学的もしくは酵素的に分解する方法が知られている。
このうち、酵素的分解方法では、例えば、トリコデルマ(Ｔｒｉｃｈｏｄｅｒｍａ)属起源、アスペルギルス(Ａｓｐｅｒｇｉｌｌｕｓ) 属起源等の市販セルラーゼ製剤をセルロースと反応させることによりセロビオースを得る方法の他、セルラーゼのセルロースへの吸着力の差を利用して、β−グルコシダーゼを除去した酵素製剤を用いてセロビオースを得る方法（特許文献１）、加水分解反応をリグニン存在下で行わせる方法（特許文献２）等が知られている。また、これらを改良し、リグノセルロースをセルラーゼ及びリグニン分解菌又はリグニン分解酵素存在下で加水分解することを特徴とするセロビオースの精製方法（特許文献３）が知られている。しかし、これらの方法で加水分解して得られた糖液は、そのままではグルコース等の単糖やセロオリゴ糖が多量に存在し、高純度セロビオースとは言い難いものであり、セロビオース収率も十分でなかった。また、得られた糖液中の、グルコースの混在率が高まると、セロビオースの結晶化が困難になることも予想される。
As a conventionally known method for producing cellobiose, a method of chemically or enzymatically decomposing cellulose is known.
Among them, the enzymatic degradation method includes, for example, a method for obtaining cellobiose by reacting a commercially available cellulase preparation of Trichoderma genus origin, Aspergillus genus origin, etc. with cellulose, as well as the adsorptive power of cellulase to cellulose. A method of obtaining cellobiose using an enzyme preparation from which β-glucosidase has been removed using the difference between the two (Patent Document 1), a method of performing a hydrolysis reaction in the presence of lignin (Patent Document 2), and the like are known. . In addition, a cellobiose purification method (Patent Document 3) is known which improves these and hydrolyzes lignocellulose in the presence of cellulase and lignin-degrading bacteria or lignin-degrading enzymes. However, the sugar solution obtained by hydrolysis by these methods contains a large amount of monosaccharides such as glucose and cellooligosaccharides as they are, and it is difficult to call high-purity cellobiose, and the cellobiose yield is sufficient. There wasn't. In addition, it is expected that crystallization of cellobiose will become difficult as the mixing ratio of glucose in the obtained sugar solution increases.
一方、化学的分解方法では、例えば、カーボンカラム等によりセロビオースを分画分取する方法（非特許文献１）が知られているが、大容量のカーボンカラムを用い溶出に大量のエタノールを使用するなど操作が非常に煩雑であり、かつセロビオース収率も十分でないために、食品分野で使用するには製造コストが非常に高く、工業的に大量生産されるに至っておらず、試薬用に極少量生産されているにすぎない。
最近になって、天然リグノセルロースを含む原料を蒸解して、その後の乾燥を経ずして得られるウエットパルプを、セルラーゼの作用により部分分解してセロビオースを得る方法が開発された（特許文献４）。この方法は、セルラーゼの作用を受け易い未乾燥ウエットパルプを基質にして限外ろ過膜を有する加水分解系でセルラーゼを作用させ、分解産物を連続的に反応系外にろ過することにより、セロビオースを含む糖液を高収率で得ることに成功している。また、同様の原理で、晒スラッシュパルプを原料とするセロビオースの精製方法が開示されている（特許文献５）。
しかしながら、これらの方法によって得られる糖液は、ブドウ糖やオリゴ糖あるいはその他の不純物を多く含み、そのままでは高純度のセロビオースを得ることはできない。
On the other hand, as a chemical decomposition method, for example, a method for fractionating cellobiose using a carbon column or the like (Non-Patent Document 1) is known, but a large volume of carbon column is used for elution with a large amount of ethanol. The operation is very complicated and the cellobiose yield is not sufficient, so it is very expensive to use in the food field, has not been industrially mass-produced, and is extremely small for reagents. It is only produced.
Recently, a method has been developed in which raw pulp containing natural lignocellulose is digested and then wet pulp obtained without subsequent drying is partially decomposed by the action of cellulase to obtain cellobiose (Patent Document 4). ). In this method, cellobiose is obtained by allowing cellulase to act in a hydrolysis system having an ultrafiltration membrane using an undried wet pulp that is susceptible to cellulase, and continuously filtering the degradation products out of the reaction system. It has succeeded in obtaining a sugar solution containing it in a high yield. Moreover, the purification method of the cellobiose which uses a bleached slush pulp as a raw material is disclosed by the same principle (patent document 5).
However, the sugar liquid obtained by these methods contains a large amount of glucose, oligosaccharide or other impurities, and as it is, high-purity cellobiose cannot be obtained.
本発明の目的は、このような状況に鑑み、合成、あるいはセルロースを分解して得られるセロビオース含有糖液から、煩雑な工程なしに、純度および回収率が飛躍的に向上した、安価なセロビオースの精製方法を提供することである。
本発明の他の目的は水に対する溶解性の高いセロビオースの製造方法を提供することである。
In view of such circumstances, an object of the present invention is to provide an inexpensive cellobiose having a drastically improved purity and recovery rate from a cellobiose-containing sugar solution obtained by synthesis or by decomposing cellulose. It is to provide a purification method.
Another object of the present invention is to provide a method for producing cellobiose having high solubility in water.
本発明者らは、セロビオースの精製方法について鋭意研究した結果、全糖質に対するセロビオースの比率を一定以上に高めたセロビオース含有糖液を脱塩、脱色処理することにより、セロビオースを結晶として析出させることができ、該結晶を採取することにより高純度セロビオースが容易に得られることを見出した。また、前記セロビオース含有糖液を強酸性陽イオン交換樹脂で分画してセロビオース濃度を高めた後に晶析することにより、さらに高回収率で高純度セロビオースが得られることを見出した。また、このようにして得られるセロビオース高含有糖液を特定の温度に加温し、そのまま粉末化することにより、元の結晶に比べて溶解性の向上したセロビオース粉末が得られることを見出した。本発明は、これらの知見に基づいてなされたものである。
すなわち、本発明は、下記に示すセロビオースの精製方法及び製造方法を提供するものである。
As a result of diligent research on a method for purifying cellobiose, the present inventors have precipitated cellobiose as crystals by desalting and decolorizing a cellobiose-containing sugar solution in which the ratio of cellobiose to the total carbohydrate is increased to a certain level or more. It was found that high purity cellobiose can be easily obtained by collecting the crystals. Further, it was found that the cellobiose-containing sugar solution was fractionated with a strongly acidic cation exchange resin to increase the cellobiose concentration, followed by crystallization, whereby high-purity cellobiose was obtained at a higher recovery rate. Moreover, it discovered that the cellobiose powder which improved the solubility compared with the original crystal | crystallization was obtained by heating the cellobiose high content sugar liquid obtained in this way to specific temperature, and pulverizing as it is. The present invention has been made based on these findings.
That is, the present invention provides the following cellobiose purification method and production method.
１．（Ａ）セロビオース含有糖液を調製する工程、（Ｂ）セロビオース含有糖液中の全糖質に対するセロビオースの比率を５０質量％以上とする工程、及び（Ｃ）セロビオースを晶析させる工程を含むことを特徴とする、セロビオースの精製方法。
２．全糖質に対するセロビオースの比率を６０質量％以上とする、上記１記載のセロビオースの精製方法。
３．工程（Ｂ）が、限外ろ過工程を含む上記１又は２記載のセロビオースの精製方法。
４．工程（Ｂ）が、限外ろ過工程後、逆浸透膜による濃縮工程を含む、上記３記載のセロビオースの精製方法。
５．工程（Ｂ）が、限外ろ過工程後、強酸性陽イオン交換樹脂による分画工程を含む、上記３記載のセロビオースの精製方法。
６．工程（Ａ）が、天然リグノセルロースを含む原料を蒸解して得られる未乾燥ウエットパルプをセルラーゼで部分分解する工程を含む、上記１〜５のいずれか１項記載のセロビオースの精製方法。
７．全糖質に対するセロビオースの比率が９０質量％以上のセロビオース含有糖液を、８０〜９５℃に保持しつつ乾燥することを特徴とするαアノマー比率の高いセロビオースの製造方法。
８．セロビオース含有糖液が、セロビオース結晶の再溶解液である、上記７記載のセロビオースの製造方法。
９．乾燥が噴霧乾燥、ドラム乾燥又はエクストルーダー加工のいずれかである上記７又は８記載のセロビオースの製造方法。
１０．セロビオース含有糖液が、天然リグノセルロースを含む原料を蒸解して得られる未乾燥ウエットパルプをセルラーゼで部分分解したものである、上記７〜９のいずれか１項記載のセロビオースの製造方法。
1. (A) including a step of preparing a cellobiose-containing sugar solution, (B) a step of setting the ratio of cellobiose to the total carbohydrate in the cellobiose-containing sugar solution to 50% by mass or more, and (C) a step of crystallizing cellobiose. A method for purifying cellobiose, characterized by
2. 2. The method for purifying cellobiose according to 1 above, wherein the ratio of cellobiose to total carbohydrate is 60% by mass or more.
3. The method for purifying cellobiose according to 1 or 2 above, wherein the step (B) includes an ultrafiltration step.
4). The method for purifying cellobiose according to 3 above, wherein the step (B) includes a concentration step using a reverse osmosis membrane after the ultrafiltration step.
5. 4. The method for purifying cellobiose according to 3 above, wherein the step (B) includes a fractionation step using a strongly acidic cation exchange resin after the ultrafiltration step.
6). 6. The method for purifying cellobiose according to any one of 1 to 5 above, wherein the step (A) comprises a step of partially decomposing undried wet pulp obtained by digesting a raw material containing natural lignocellulose with cellulase.
7). A method for producing cellobiose with a high α-anomer ratio, which comprises drying a cellobiose-containing sugar solution having a ratio of cellobiose to 90% by mass or more with respect to the total carbohydrates while maintaining at 80 to 95 ° C.
8). 8. The method for producing cellobiose according to 7 above, wherein the cellobiose-containing sugar solution is a re-dissolved solution of cellobiose crystals.
9. 9. The method for producing cellobiose as described in 7 or 8 above, wherein the drying is any one of spray drying, drum drying and extruder processing.
10. 10. The method for producing cellobiose according to any one of 7 to 9 above, wherein the cellobiose-containing sugar solution is obtained by partially decomposing undried wet pulp obtained by digesting a raw material containing natural lignocellulose with cellulase.
本発明の精製方法によれば、高純度のセロビオースを高収率で安価に得ることができる。また、本発明の製造方法によれば、αアノマー比率が高く、水に対する溶解性の高い、高純度のセロビオースを高収率で安価に得ることができる。従って、本発明により得られるセロビオーズは、天然の非消化性甘味料として、健康食品や糖尿病対応食品など広範な食品分野への応用が期待できる。また、化粧品原料や医薬品原料としての用途も期待できる。 According to the purification method of the present invention, high-purity cellobiose can be obtained in high yield and at low cost. Moreover, according to the production method of the present invention, high-purity cellobiose having a high α anomer ratio and high solubility in water can be obtained at a high yield and at a low cost. Therefore, the cellobiose obtained by the present invention can be expected to be applied as a natural non-digestible sweetener to a wide range of food fields such as health foods and foods for diabetes. Moreover, the use as a cosmetic raw material or a pharmaceutical raw material can also be expected.
本発明は、（Ａ）セロビオース含有糖液を調製する工程、（Ｂ）セロビオース含有糖液中の全糖質に対するセロビオースの比率を５０質量％以上とする工程、及び（Ｃ）セロビオースを晶析させる工程を含むことを特徴とする、セロビオースの精製方法である。
本発明に使用するセロビオース含有糖液の調製は、公知の方法で行うことができ、例えば特許文献４に記載の方法を用いることができる。すなわち、天然リグノセルロースを含む原料の蒸解後の乾燥を経ていない湿潤状態の未晒しサルファイトパルプにｐＨ５．５の酢酸緩衝液を加えることで２ｗｔ％のスラリー液を調製する。次に、この調製されたスラリー液を限外ろ過膜を備えたバイオリアクターに投入し、ポンプで循環させながらそのスラリー液を４５℃に加温するとともに、この４５℃の温度を保持しつつそのスラリー液に対して０．１ｗｔ％のＴｒｉｃｈｏｄｅｒｍａ ｖｉｒｉｄｅ属起源のセルラーゼを添加して４時間に亘って反応させることによりセルロースを加水分解させ、セロビオース含有糖液を得る。
また、セロビオース含有糖液を得る別の方法として、特許文献５に記載の方法を用いることもできる。
The present invention includes (A) a step of preparing a cellobiose-containing sugar solution, (B) a step of setting the ratio of cellobiose to the total carbohydrate in the cellobiose-containing sugar solution to 50% by mass or more, and (C) crystallizing cellobiose. It is a purification method of cellobiose characterized by including a process.
The cellobiose-containing sugar solution used in the present invention can be prepared by a known method. For example, the method described in Patent Document 4 can be used. That is, a 2 wt% slurry solution is prepared by adding a pH 5.5 acetate buffer solution to wet unbleached sulfite pulp that has not undergone drying after cooking of the raw material containing natural lignocellulose. Next, the prepared slurry is put into a bioreactor equipped with an ultrafiltration membrane, and the slurry is heated to 45 ° C. while being circulated by a pump, and the temperature of 45 ° C. is maintained while the slurry is maintained. Cellulose is hydrolyzed by adding 0.1 wt% of the cellulase derived from the genus Trichoderma viride to the slurry solution and reacting for 4 hours to obtain a cellobiose-containing sugar solution.
In addition, as another method for obtaining a cellobiose-containing sugar solution, the method described in Patent Document 5 can also be used.
次に、こうして得られたセロビオース含有糖液中の全糖質に対するセロビオースの比率を５０質量％以上とする。
例えば、上述の限外濾過膜を通過した加水分解反応液をそのまま濃縮、あるいは低阻止率の逆浸透膜で濃縮することにより、セロビオース含有糖液中の全糖質に対するセロビオースの比率を５０質量％以上とすることができる。ここでいう低阻止率の逆浸透膜は、ルーズＲＯ膜ともいわれ、ブドウ糖の大部分を通過させるがセロビオースの大部分は通過させない機能を有する逆浸透膜であれば特に制限は無いが、一例として日東電工(株)のＮＴＲ−７２５０をあげることができる。
このようにして得られるセロビオース含有糖液におけるセロビオースの全糖質に対する比率は、５０質量％以上、好ましくは６０質量％以上である。５０質量％未満であると、次の晶析工程での結晶の回収率が低下する。換言すれば、該糖液中に存在するブドウ糖はセロビオースの結晶化を阻害するので、その含有量はセロビオース含量よりも低いことが好ましい。
該セロビオース含有糖液は、さらに適当な手段、例えば活性炭による脱色、及び適当な手段、例えばイオン交換樹脂による脱塩を行うことが好ましい。これらの工程は後の結晶化工程を容易にする。脱色、脱塩を行ったセロビオース含有糖液は、セロビオース濃度が１４（ｗ／ｖ）％を超えるまで濃縮することが好ましい。１４（ｗ／ｖ）％以下であると結晶の回収率が低下する。
Next, the ratio of cellobiose to the total carbohydrate in the cellobiose-containing sugar solution thus obtained is set to 50% by mass or more.
For example, by concentrating the hydrolysis reaction solution that has passed through the above ultrafiltration membrane as it is or by concentrating it with a reverse osmosis membrane having a low inhibition rate, the ratio of cellobiose to total carbohydrate in the cellobiose-containing sugar solution is 50% by mass. This can be done. The reverse osmosis membrane having a low blocking rate here is also called a loose RO membrane, and there is no particular limitation as long as it is a reverse osmosis membrane having a function of allowing most of glucose to pass but not most of cellobiose, but as an example NTR-7250 manufactured by Nitto Denko Corporation can be listed.
The ratio of cellobiose to the total carbohydrate in the cellobiose-containing sugar solution thus obtained is 50% by mass or more, preferably 60% by mass or more. If it is less than 50% by mass, the crystal recovery rate in the next crystallization step is lowered. In other words, since glucose present in the sugar solution inhibits cellobiose crystallization, the content is preferably lower than the cellobiose content.
The cellobiose-containing sugar solution is preferably further subjected to a suitable means such as decolorization with activated carbon and a suitable means such as desalting with an ion exchange resin. These steps facilitate the subsequent crystallization step. The cellobiose-containing sugar solution that has been decolorized and desalted is preferably concentrated until the cellobiose concentration exceeds 14 (w / v)%. When the amount is 14 (w / v)% or less, the crystal recovery rate decreases.
セロビオースの結晶化を阻害するブドウ糖、オリゴ糖及びその他の不純物は、必要に応じてイオン交換樹脂等により除去することができる。例えば、セロビオース含有糖液を強酸性陽イオン交換樹脂（Ｎａ型又はＣａ型）のカラムに通し、水で展開することにより、セロビオースとブドウ糖、オリゴ糖及びその他の不純物を分離することができる。このようにして、さらにセロビオース濃度及び純度が向上したセロビオース含有糖液を調製することで、高純度のセロビオース結晶を高収率で得ることができる。 Glucose, oligosaccharide and other impurities that inhibit cellobiose crystallization can be removed with an ion exchange resin or the like, if necessary. For example, cellobiose and glucose, oligosaccharide, and other impurities can be separated by passing the cellobiose-containing sugar solution through a strongly acidic cation exchange resin (Na-type or Ca-type) column and developing with water. In this way, by preparing a cellobiose-containing sugar solution with further improved cellobiose concentration and purity, high-purity cellobiose crystals can be obtained in high yield.
これらの処理を経て得られるセロビオースの全糖質に対する比率が５０質量％以上のセロビオース含有糖液を濃縮すれば、セロビオースが晶析し、容易にセロビオースの結晶を含むスラリーを得ることができる。析出した結晶は、公知の手段、例えばろ過、遠心分離により回収することができる。必要に応じて再結晶操作を行っても良い。回収した結晶は、少量の冷水及び／又は含水エタノールで洗浄した後乾燥する。
得られた結晶の純度及び回収率はセロビオース含有糖液の特性にもよるが、通常それぞれ９３質量％以上及び４０質量％以上である。なお、セロビオース含量は高速液体クロマトグラフィー（ＨＰＬＣ）によって測定することができる。
If a cellobiose-containing sugar solution having a ratio of cellobiose to 50% by mass or more obtained through these treatments is concentrated, cellobiose crystallizes, and a slurry containing cellobiose crystals can be easily obtained. The precipitated crystals can be recovered by a known means such as filtration or centrifugation. You may perform recrystallization operation as needed. The recovered crystals are washed with a small amount of cold water and / or water-containing ethanol and then dried.
The purity and recovery rate of the obtained crystals are usually 93% by mass or more and 40% by mass or more, respectively, depending on the characteristics of the cellobiose-containing sugar solution. The cellobiose content can be measured by high performance liquid chromatography (HPLC).
さらに本発明は、全糖質に対するセロビオースの比率が９０質量％以上のセロビオース含有糖液を、８０〜９５℃に保持しつつ乾燥することを特徴とするαアノマー比率の高いセロビオースの製造方法を提供するものである。
結晶セロビオースの水に対する溶解性（溶解速度）は立体異性体の比率（α及びβアノマーの比率）によって異なる。セロビオース結晶を水に溶解して、沸騰しない範囲の高温、好ましくは８０〜９５℃に０．５〜２．０時間保持し、この温度を保持しつつ乾燥することによって、αアノマーの比率が高まり、溶解性の向上したセロビオース粉末を得ることができる。ここでいう溶解性は、例えば２５℃の水１００ｍｌに１０ｇの試料を加えて撹拌したときの試料の完全溶解に要する時間で評価することができる。
乾燥方法に特に制限は無いが、例えば、噴霧乾燥、ドラム乾燥、及びエクストルーダー加工が例示される。
溶解性の向上したセロビオース製品は、晶析工程を経ることなく製造することもできる。すなわち、強酸性陽イオン交換樹脂による分画操作によってセロビオース含量を９０質量％以上に高めたセロビオース含有糖液を、前記方法により乾燥することで、晶析工程を経て製造された結晶に比べて溶解性の高いセロビオース製品を得ることができる。
Furthermore, the present invention provides a method for producing cellobiose with a high α-anomer ratio, characterized in that a cellobiose-containing sugar solution having a ratio of cellobiose to total carbohydrate of 90% by mass or more is dried while being maintained at 80 to 95 ° C. To do.
The solubility (dissolution rate) of crystalline cellobiose in water varies depending on the ratio of stereoisomers (ratio of α and β anomers). Dissolving cellobiose crystals in water and holding at a high temperature that does not boil, preferably 80 to 95 ° C. for 0.5 to 2.0 hours, and drying while maintaining this temperature increases the ratio of α anomer. Thus, cellobiose powder with improved solubility can be obtained. The solubility here can be evaluated by, for example, the time required for complete dissolution of the sample when 10 g of the sample is added to 100 ml of water at 25 ° C. and stirred.
Although there is no restriction | limiting in particular in a drying method, For example, spray drying, drum drying, and an extruder process are illustrated.
Cellobiose products with improved solubility can also be produced without going through a crystallization process. That is, the cellobiose-containing sugar liquid whose cellobiose content has been increased to 90% by mass or more by fractionation with a strongly acidic cation exchange resin is dissolved by the above method, so that it is dissolved in comparison with the crystals produced through the crystallization process. A highly functional cellobiose product can be obtained.
以下に試験例及び実施例を挙げて本発明を具体的に説明するが、本発明は以下の実施例に限定されるものではない。
（試験例１）
（セロビオースの溶解度の測定）
市販セロビオース（和光純薬製）の２０（ｗ／ｖ）％溶液を調製し、１０〜６０℃の恒温槽に保持し、結晶が発生した後、上清中の水分をカールフィッシャー水分計にて測定し、１００％から減算することにより溶解度を算出した。
EXAMPLES The present invention will be specifically described below with reference to test examples and examples, but the present invention is not limited to the following examples.
(Test Example 1)
(Measurement of solubility of cellobiose)
A 20% (w / v) solution of commercially available cellobiose (manufactured by Wako Pure Chemical Industries, Ltd.) is prepared and held in a thermostatic bath at 10 to 60 ° C. After crystals are generated, the moisture in the supernatant is measured with a Karl Fischer moisture meter. The solubility was calculated by measuring and subtracting from 100%.
（表１）
表１の結果は、セロビオース含有糖液からセロビオースの晶析を行う場合、例えば２０℃においては、糖液のセロビオース濃度が少なくとも１４（ｗ／ｖ）％を超えるまで濃縮する必要があることを示唆している。 The results in Table 1 suggest that when cellobiose is crystallized from a cellobiose-containing sugar solution, for example, at 20 ° C., the cellobiose concentration of the sugar solution needs to be concentrated to at least 14 (w / v)%. is doing.
（試験例２）
（セロビオースの結晶化に及ぼすブドウ糖の影響）
セロビオース（和光純薬製）とブドウ糖（キシダ化学（株）製）を混合して表２に示すＢｒｉｘ４０および５０の溶液を調製し、２０℃で９０時間放置後、晶析の有無を目視により判定した。また、結晶の回収できたサンプルについては、セロビオース純度を高速液体クロマトグラフィーにより分析した。
(Test Example 2)
(Effect of glucose on crystallization of cellobiose)
Cellobiose (manufactured by Wako Pure Chemical Industries, Ltd.) and glucose (manufactured by Kishida Chemical Co., Ltd.) are mixed to prepare the solutions of Brix 40 and 50 shown in Table 2, and after standing at 20 ° C. for 90 hours, the presence or absence of crystallization is visually determined. did. Moreover, the cellobiose purity was analyzed by the high performance liquid chromatography about the sample which has collect | recovered the crystal | crystallization.
（表２）
表２より、混合液中のブドウ糖含有比率が５０％を超えると、晶析が困難になることが認められた。また、Ｂｒｉｘ濃度を高めて晶析させた試料では、結晶のセロビオース純度が低下することが認められた。さらに、得られた結晶を走査型電子顕微鏡で表面構造を観察したところ、結晶が大きいほどセロビオース純度が高い傾向にあることが観察された。
以上の結果は、セロビオース含有比率が５０％以上、ブドウ糖含有比率が５０％以下で、Ｂｒｉｘが４０〜５０に調整されたセロビオース含有糖液を調製することにより、高純度のセロビオース結晶が高回収率で得られることを示している。
From Table 2, it was recognized that crystallization becomes difficult when the glucose content ratio in the mixed solution exceeds 50%. Further, it was confirmed that the cellobiose purity of the crystal was lowered in the sample crystallized by increasing the Brix concentration. Furthermore, when the surface structure of the obtained crystal was observed with a scanning electron microscope, it was observed that the larger the crystal, the higher the cellobiose purity.
The above results show that by preparing a cellobiose-containing sugar solution having a cellobiose content ratio of 50% or more, a glucose content ratio of 50% or less, and a Brix adjusted to 40-50, a high-purity cellobiose crystal has a high recovery rate. It can be obtained by.
実施例１
特許文献４（特開平７−１８４６７８）に記載の実施例に準じて、ウェットパルプからセロビオース含有糖液を調製した。すなわち、天然リグノセルロースを含む原料の蒸解後の乾燥を経ていない湿潤状態の哂しサルファイトパルプにｐＨ５．５の酢酸緩衝液を加えることで２ｗｔ％のスラリー液を調製した。次に、この調製されたスラリー液を分画分子量1万のポリスルフォン膜を備えたバイオリアクターに投入し、ポンプで循環させながらそのスラリー液を４５℃に加温するとともに、この４５℃の温度を保持しつつそのスラリーに対して０．１ｗｔ％のＴｒｉｃｈｏｄｅｒｍａ ｖｉｒｉｄｅ属起源のセルラーゼを添加して4時間に亘って反応させることによりセルロースを加水分解した。この限外ろ過膜を通過した加水分解反応液を濃縮し、全糖質に対する比率が６８％のセロビオースを含むセロビオース含有糖液を調製した。
このセロビオース含有糖液を活性炭で脱色し、次いで両性イオン交換樹脂（オルガノ社製）に通して脱イオン処理した。この時点で固形分あたりのセロビオース濃度は７０％、ブドウ糖濃度は２４％であった。続いて、溶液の固形分濃度が５５％になるまで濃縮し、結晶セロビオースを含むスラリーを得た。結晶セロビオースを含むスラリーを遠心分離して、採取した結晶を少量の水で洗浄後乾燥し、純度９５％の結晶セロビオースを、もともとセロビオース含有糖液に含まれていたセロビオースに対して６３％の収率で得た。
Example 1
A cellobiose-containing sugar solution was prepared from wet pulp according to the example described in Patent Document 4 (Japanese Patent Laid-Open No. 7-184678). That is, a 2 wt% slurry liquid was prepared by adding an acetic acid buffer solution having a pH of 5.5 to wet tanned sulfite pulp that had not undergone drying after cooking of the raw material containing natural lignocellulose. Next, the prepared slurry is put into a bioreactor equipped with a polysulfone membrane having a molecular weight cut off of 10,000, and the slurry is heated to 45 ° C. while being circulated by a pump. The cellulose was hydrolyzed by adding 0.1 wt% of the cellulase derived from the genus Trichoderma viride to the slurry while allowing the reaction to take place for 4 hours. The hydrolysis reaction solution that passed through the ultrafiltration membrane was concentrated to prepare a cellobiose-containing sugar solution containing cellobiose in a ratio of 68% to the total sugars.
This cellobiose-containing sugar solution was decolorized with activated carbon, and then passed through an amphoteric ion exchange resin (manufactured by Organo Corporation) for deionization treatment. At this time, the cellobiose concentration per solid content was 70%, and the glucose concentration was 24%. Subsequently, the solution was concentrated until the solid concentration of the solution became 55% to obtain a slurry containing crystalline cellobiose. The slurry containing crystalline cellobiose is centrifuged, and the collected crystals are washed with a small amount of water and then dried, so that 95% pure crystalline cellobiose is obtained in an amount of 63% of the cellobiose originally contained in the cellobiose-containing sugar solution. Obtained at a rate.
実施例２
実施例1と同様の方法にて調製した、全糖質に対する比率が６８％のセロビオースを含むセロビオース含有溶液にブドウ糖を添加し、セロビオース６１％、ブドウ３５％の糖組成溶液を調製した。活性炭、イオン交換樹脂処理後、固形分濃度が５５％になるまで濃縮し、結晶セロビオースを含むスラリーを得た。このスラリーを遠心分離して、少量の水で結晶を洗浄後乾燥し、純度９３％の結晶セロビオースを、もともとセロビオース含有糖液に含まれていたセロビオースに対して４０％の収率で得た。
Example 2
Glucose was added to a cellobiose-containing solution containing cellobiose with a ratio of 68% to the total carbohydrates prepared in the same manner as in Example 1 to prepare a sugar composition solution of 61% cellobiose and 35% grapes. After the activated carbon and ion exchange resin treatment, the slurry was concentrated until the solid concentration was 55% to obtain a slurry containing crystalline cellobiose. The slurry was centrifuged, and the crystals were washed with a small amount of water and dried to obtain 93% pure crystalline cellobiose in a yield of 40% with respect to cellobiose originally contained in the cellobiose-containing sugar solution.
実施例３
実施例１と同様の方法でバイオリアクターを利用して調製した、全糖質に対する比率が６３％のセロビオースを含むセロビオース含有糖液を、ルーズＲＯ膜（日東電工製ＮＴＲ７２５０）を有する膜濃縮システムを用いて連続濃縮した。すなわち、バイオリアクターの限外ろ過膜を通過した糖液を連続的に本システムに供給し、濃縮液は本システムを循環し、通過液は連続的に系外に排出させた。得られた濃縮液は約１２倍に濃縮され、セロビオース比率は８０％に上昇し、ブドウ糖比率は３３％から１６％に低下していた。これを活性炭で脱色し、次いでイオン交換樹脂で脱塩した後、固形分濃度が５０％になるまで濃縮し、結晶セロビオースを含むスラリーを得た。実施例１と同様の方法で結晶を回収、乾燥し、純度９６％の結晶セロビオースをもとのセロビオース含有糖液に含まれていたセロビオースに対して７０％の収率で得た。
Example 3
A membrane concentration system having a loose RO membrane (NTR7250 made by Nitto Denko) was prepared by using a cellobiose-containing sugar solution containing cellobiose having a ratio of 63% to the total carbohydrates prepared using a bioreactor in the same manner as in Example 1. Used for continuous concentration. That is, the sugar solution that passed through the ultrafiltration membrane of the bioreactor was continuously supplied to the system, the concentrated solution was circulated through the system, and the passed solution was continuously discharged out of the system. The resulting concentrate was concentrated about 12 times, the cellobiose ratio increased to 80%, and the glucose ratio decreased from 33% to 16%. This was decolorized with activated carbon, and then desalted with an ion exchange resin, and then concentrated until the solid concentration was 50% to obtain a slurry containing crystalline cellobiose. Crystals were collected and dried in the same manner as in Example 1, and crystal cellobiose with a purity of 96% was obtained in a yield of 70% with respect to cellobiose contained in the original cellobiose-containing sugar solution.
実施例４
実施例1と同様の方法にて調製した、全糖質に対する比率が６５％のセロビオース含有糖液６０ｍｌ（固形分濃度５０％）を、１０リットルのＮａ型強酸性イオン交換樹脂（オルガノ社製）のカラムに負荷して、カラム温度７０℃、ＳＶ１．０で水で展開し、ブドウ糖画分とセロビオース画分に分画した。この分画により、固形分あたりセロビオース濃度９１％、ブドウ糖濃度５％を含むセロビオース含有糖液が得られ、同時に塩類、たんぱく質などの不純物も除去されていた。このようにして調製されたセロビオース含有糖液を、実施例2と同様に活性炭、イオン交換樹脂処理後、固形分濃度が４５％になるまで濃縮し、結晶セロビオースを含むスラリーを得た。このスラリーを遠心分離して、少量の水で結晶を洗浄後乾燥し、結晶セロビオースを回収した。得られた結晶の純度は９８％で、回収率は８０％であった。
ここで、実施例１〜４で調製したセロビオース含有糖液のセロビオース濃度及びブドウ糖濃度と、得られた結晶の純度及び回収率の関係をまとめて表３に示す。
Example 4
60 liters of a cellobiose-containing sugar solution (solid content concentration 50%) prepared in the same manner as in Example 1 and having a ratio of 65% to the total sugar content of 10 liters of Na-type strongly acidic ion exchange resin (manufactured by Organo) The column was developed with water at a column temperature of 70 ° C. and an SV of 1.0, and fractionated into a glucose fraction and a cellobiose fraction. By this fractionation, a cellobiose-containing sugar solution containing a cellobiose concentration of 91% and a glucose concentration of 5% per solid content was obtained, and at the same time impurities such as salts and proteins were removed. The cellobiose-containing sugar solution prepared in this manner was treated with activated carbon and an ion exchange resin in the same manner as in Example 2 and then concentrated until the solid content concentration became 45% to obtain a slurry containing crystalline cellobiose. The slurry was centrifuged, and the crystals were washed with a small amount of water and then dried to recover crystalline cellobiose. The purity of the obtained crystal was 98%, and the recovery rate was 80%.
Here, Table 3 summarizes the relationship between the cellobiose concentration and glucose concentration of the cellobiose-containing sugar solutions prepared in Examples 1 to 4 and the purity and recovery rate of the obtained crystals.
（表３）
回収率は濃縮前糖液中に含まれるセロビオース重量に対して、回収された結晶物の割合で表した。
表３より、糖液中のブドウ糖濃度を低下させることにより、回収される結晶物のセロビオース純度及び回収率を大幅に向上させることが可能であるとともに、高純度、高回収率のためには、セロビオース濃度は６０％以上に高めておくことが有効であることが示された。また、セロビオース含有糖液中のブドウ糖を除去するために、限外ろ過膜の通過液をルーズＲＯ膜で濃縮することにより、あるいは限外ろ過膜の通過濃縮液を強酸性イオン交換樹脂のカラムで分画することにより、セロビオース濃度を飛躍的に高められることが示された。これは、これらの操作、分画により、ブドウ糖、塩類、あるいはタンパク質などの不純物も同時に除去できることに起因していると考えられる。
The recovery rate was expressed as the ratio of recovered crystals to the cellobiose weight contained in the sugar solution before concentration.
From Table 3, by reducing the glucose concentration in the sugar solution, it is possible to greatly improve the cellobiose purity and recovery rate of the recovered crystals, and for high purity and high recovery rate, It was shown that it is effective to increase the cellobiose concentration to 60% or more. In addition, in order to remove glucose in the cellobiose-containing sugar solution, the passing solution of the ultrafiltration membrane is concentrated with a loose RO membrane, or the passing solution of the ultrafiltration membrane is filtered with a strongly acidic ion exchange resin column. It was shown that the cellobiose concentration can be dramatically increased by fractionation. This is considered to be because impurities such as glucose, salts, or proteins can be removed at the same time by these operations and fractionation.
実施例５
実施例４で得られたセロビオース高含有糖液を固形分濃度２０％とし、液温２０℃、６０℃、又は８０℃に１時間保持し、その後直ちにスプレー乾燥機にて乾燥してセロビオース粉末を調製した。これらセロビオース粉末の溶解性及びアノマー比率を表４に示した。なお、アノマー比率は、Ｊ＆Ｗ社製 ＤＢ１７０１(内径０．２５ｍｍ、長さ３０ｍ)カラムを用い、島津製作所製ガスクロマトグラフＧＣ１４にて分析した。すなわち、試料１．０ｍｇを０．７６９ｍｌのピリジンに溶解し、溶解液に０．０７７ｍｌのＴＭＳＣ及び０．１５４ｍｌのＨＭＤＳを加えて室温で１時間保持した後、ガスクロマトグラフ分析に供した。溶解性は、２５℃のイオン交換水１００ｍｌにサンプル１０ｇを添加して撹拌した時の完全溶解に要する時間（溶解時間）で示した(表４)。なお、実施例１で得られた結晶のα及びβアノマーの比率はそれぞれ７．５％及び９２．５％であり、その溶解時間は１２．５分であった。
Example 5
The cellobiose-rich sugar solution obtained in Example 4 was adjusted to a solid content concentration of 20%, held at a liquid temperature of 20 ° C., 60 ° C., or 80 ° C. for 1 hour, and then immediately dried in a spray dryer to obtain a cellobiose powder. Prepared. Table 4 shows the solubility and anomeric ratio of these cellobiose powders. The anomeric ratio was analyzed with a gas chromatograph GC14 manufactured by Shimadzu Corporation using a DB1701 (inner diameter 0.25 mm, length 30 m) column manufactured by J & W. That is, 1.0 mg of a sample was dissolved in 0.769 ml of pyridine, 0.077 ml of TMSC and 0.154 ml of HMDS were added to the solution, which was kept at room temperature for 1 hour, and then subjected to gas chromatographic analysis. The solubility was shown by the time (dissolution time) required for complete dissolution when 10 g of a sample was added to 100 ml of ion exchange water at 25 ° C. and stirred (Table 4). The α and β anomer ratios of the crystals obtained in Example 1 were 7.5% and 92.5%, respectively, and the dissolution time was 12.5 minutes.
（表４）
表4より、糖液温度を制御して乾燥することにより、アノマー比率の異なる、溶解性の向上したセロビオース粉末を得られることが確認された。 From Table 4, it was confirmed that cellobiose powder having different anomeric ratios and improved solubility can be obtained by controlling the sugar solution temperature and drying.
Claims (10)
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| JP2005116054A JP4898135B2 (en) | 2005-04-13 | 2005-04-13 | Cellobiose purification method and production method |
| US11/911,146 US8580955B2 (en) | 2005-04-13 | 2006-04-12 | Purification method and production method for cellobiose |
| KR1020077023342A KR100939551B1 (en) | 2005-04-13 | 2006-04-12 | Purification method and production method for cellobiose |
| GB0719557A GB2438573B (en) | 2005-04-13 | 2006-04-12 | Purification method and production method for cellobiose |
| CA2604328A CA2604328C (en) | 2005-04-13 | 2006-04-12 | Purification method and production method for cellobiose |
| PCT/JP2006/307726 WO2006112316A1 (en) | 2005-04-13 | 2006-04-12 | Purification method and production method for cellobiose |
| FI20070770A FI125039B (en) | 2005-04-13 | 2007-10-12 | Purification procedure and preparation process for cellobiose |
| GBGB0815071.6A GB0815071D0 (en) | 2005-04-13 | 2008-08-18 | Purification method and production method for cellobiose |
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| ES2745449T3 (en) | 2014-09-10 | 2020-03-02 | Pfeifer & Langen Gmbh & Co Kg | Procedure for the enzymatic preparation of a product and a glucoside co-product from a glucoside educt |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63226294A (en) * | 1987-03-17 | 1988-09-20 | Ajinomoto Co Inc | Production of cellobiose |
| JPH0331294A (en) * | 1989-06-28 | 1991-02-12 | Gun Ei Chem Ind Co Ltd | New oligosaccharide and production thereof |
| JPH05317073A (en) * | 1992-05-21 | 1993-12-03 | Takashi Watanabe | Production of cellooligosaccharide |
| JPH07184678A (en) * | 1993-12-28 | 1995-07-25 | Nippon Kagaku Kikai Seizo Kk | Production of cello-oligosaccharide |
| JPH0889274A (en) * | 1994-09-28 | 1996-04-09 | Nippon Paper Ind Co Ltd | Production of cellobiose |
| JPH09107987A (en) * | 1995-10-17 | 1997-04-28 | Nippon Paper Ind Co Ltd | Production of cellobiose |
| JP2005068140A (en) * | 2003-08-07 | 2005-03-17 | Nippon Paper Chemicals Co Ltd | Method for producing cellooligosaccharide |
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| GB0025438D0 (en) * | 2000-10-17 | 2000-11-29 | Unilever Plc | Esters |
| FI20020675A0 (en) | 2002-04-09 | 2002-04-09 | Danisco Sweeteners Oy | Purification of a pure disaccharide solution |
| WO2005056811A1 (en) * | 2003-12-12 | 2005-06-23 | Ezaki Glico Co., Ltd. | METHOD OF CONVERTING β-1,4-GLUCAN TO α-GLUCAN |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63226294A (en) * | 1987-03-17 | 1988-09-20 | Ajinomoto Co Inc | Production of cellobiose |
| JPH0331294A (en) * | 1989-06-28 | 1991-02-12 | Gun Ei Chem Ind Co Ltd | New oligosaccharide and production thereof |
| JPH05317073A (en) * | 1992-05-21 | 1993-12-03 | Takashi Watanabe | Production of cellooligosaccharide |
| JPH07184678A (en) * | 1993-12-28 | 1995-07-25 | Nippon Kagaku Kikai Seizo Kk | Production of cello-oligosaccharide |
| JPH0889274A (en) * | 1994-09-28 | 1996-04-09 | Nippon Paper Ind Co Ltd | Production of cellobiose |
| JPH09107987A (en) * | 1995-10-17 | 1997-04-28 | Nippon Paper Ind Co Ltd | Production of cellobiose |
| JP2005068140A (en) * | 2003-08-07 | 2005-03-17 | Nippon Paper Chemicals Co Ltd | Method for producing cellooligosaccharide |
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| CA2604328A1 (en) | 2006-10-26 |
| FI125039B (en) | 2015-04-30 |
| GB2438573B (en) | 2009-08-26 |
| GB0719557D0 (en) | 2007-11-14 |
| US8580955B2 (en) | 2013-11-12 |
| KR100939551B1 (en) | 2010-02-03 |
| GB0815071D0 (en) | 2008-09-24 |
| KR20070112843A (en) | 2007-11-27 |
| FI20070770A (en) | 2007-10-12 |
| CA2604328C (en) | 2011-12-06 |
| JP4898135B2 (en) | 2012-03-14 |
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